There's a lot here that can be involved so you'll need to do some learning on your own.
The main things to learn about are: the <video> element and the basics about how HTML and CSS work together. Can you create a page that has just the video in it and playable?
You will probably need something like this. But will need to work out the actual outline of the Frame to make it look like a TV:
https://www.w3schools.com/howto/tryit.asp?filename=tryhow_css_responsive_iframe_169
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